Mitsuaki wants to be an actor. One day, he joins a theatrical group called "Back Set". The boss of the group is Kyouka, a stage director, and she is a little bit odd. Members come and go... "It's hard to lead the group..." She tries her hardest to gather members and somehow makes manages to reel in a voice actress, an idol singer, and a dancer. Kyouka says to Mitsuaki, "Mitsuaki, I want you to be a cast leader. Well, take care of other members." He is surprised to hear that, but he does his best...